On 21 Oct 1345 Henry of Grosmont 1st Duke Lancaster 1310-1361 (35) commanded an English army including Walter Manny 1st Baron Manny 1310-1372 (35) at Auberoche, Perigueux during the Battle of Auberoche. The battle was a significant victory for the English with the French forces being heavily defeated. The ransoms alone made a fortune for many of the soldiers in Derby's army, as well as Derby himself, who was said to have made at least £50,000 from the day's captives, and sealed his reputation as 'one of the best warriors in the world'.

In Jun 1348 the Black Death arrived in England. The first of many occurrences. It is estimated to have killed between 25 to 60 percent of the population of around six million. The outbreak lasted through 1349 recurring in 1362, 1369 and regularly thereafter until its last significant outbreak in The Great Plague of 1666.